Henri francis hebrard



H. F. HE'BRARD; DEVICE FOR-TRANSMITTING MOTIDN T0 GYROSCDPIC BODIES. APPLICATION FILED MAR. 23, I9I8.

l 3 1L l Q lPatented July 29, 1919.

HENRI FRANCIS HBRARD, or PARIS, FRANCE.

DEVICE FOR TRANSMITTIG MOTION TO GYROSCOPIC BODIES.

Specification of Letters Patent.

Patented July 29, 1919.

'Application 1aed March 23, 191s. smal No. 224,359.

To all wlw/n 'it may concern:

Be it known that I, HENRI .FRANCIS HBRARD, citizen of the Republic of France, and resident of Paris, France, (post-otlice Aaddress 6 Rue Antoine Chantim) have in- The device consists essentially in the combination of a transmlsslon gear comprising Y a universally-mounted ring the center of oscillation of which is near'the center of oscillation of the Agyroscopic body, and of an intermediate clutch between the ring and gyroscopic body constituted by pawls, balls or 'other suitable means.

This device enables a gyroscopic body of any size to be set in motion; it may also be used with all apparatus or instruments in which gyroscopic bodies are used, such as gyroscopic tops, leveling mirrors, gyrosco ic inclinometers automatic stabilizin devices for aeronautical or marine purposes and so forth.

The power for this transmission gear may be pneumatic, hydraulic, gaseous, steam or electrical.

In order to render as clear as possible the explanation given below, reference is made to the accompanying drawing which shows by way of example a vertical sectional view of one form of device for transmission of motion constructed according to the present invention.

The device consists essentially of a gyro- ,stat A supported by the needle bearing B in a step bearing or cup C= of hardened steel, the point of the needle forming the center of oscillation of the gyrostat. The sleeve D surrounding the spindle E of the bearing C revolves freely on bronze rmgs F. It carries at Aits upper part two lugs G, and at its lower part a gear H actuated by the driving' pinion J. The'lugs G support by means of pivots the universal joint ring K which latter carries the cylindrical bridge piece L by means of pivots arranged at an interval of 90o in relation to those on the lugs G. The ring K is thus enabled to rock or oscillate about two axes which intersect each other at right angles, one of such axes being constituted by the pivots on said ring, and the other by the pivots on l -the lugs G. The point of intersection of these two axes thus forms the center of oscillation of the said ring, and this point, as will be observed, is near the center of oscillation of the gyrostat, c'. c., the point of the needle B. The upper surface of the bridge piece is provided with a ratchet crown with which engage `pawls M provided on. the gyrostat A and serving to drive the latter.

The sleeve D is rotated by a motor drivingv the pinions J and H and this motion is transmitted through the lugs G to the ring K and thence to the bridge piece L, the ratchet on the latter operating the pawls on the gyrostat A and causing the same to revolve. Lateral displacement of the needle bearing B in the cup bearing (whether due to acceleration or to retardation or to centrifugal forces) 'makes it necessary for the pivots of the ring K to have a certain amount of play in order to avoid jamming.

The ratchet and Vpawl arrangement allows the gyrostat A to continue its gyratory motion with a practically constant speed in spite of any momentary retardation of the motor.

I claim:

l. In a device of the character described, the combination of a gyroscopic body; and a transmission gear ,for rotating said body comprising a universally-mounted member, the center of oscillation of which is located near the center of oscillation of said body, and a driving clutch interposed be-` tween said member and said body.

2. In a device of the character described, the combination of a gyroscopic body; and a transmission gear for rotating said body comprising a driving wheel, a spindle on which said wheel freely rotates. a pair of upstanding, oppositely-located lugs carried b v said wheel,- -a ring pivotally connected at dia1lietrically-opposite points to said. lugs, a bridge pivotally mounted on said ring, the bridge pivots being disposed at 90O in relation to the ring pivots, and a driving clutch interposed between said bridge and said body.

3. In a the combination of a gyroscopic body; and a transmission gear for rotating said body comprising a driving wheel, a spindle on `ing disposed at 90o which said Wheel freely rotates, a pairof upstanding, oppositely-located lugs carried by said Wheel, avring pivotally connected at diametrically-opposite points to said lugs, a bridge pivotally mounted on said ring and having its upper surface ratcheted, the bridge pivots being disposed at 900 in relation to the ring pivots, and means carried by said body for engagement with said ratchet surface, thereby to effect ,the rotation of said body.

4. In a deviceof the character described, the combination of a gyroscopic body; and a transmission gear for rotating said body comprising a universally-mounted member, the center of oscillation of which is located near the center of oscillation of said body, said member being provided with a ratchet, and means carried by. said body for engagement with said ratchet, to effect the rotation of the former.

A5. In a device of the character described, the combination of a gyroscopic body; andl a transmission gear for rotating said body comprising a pivotally-inounted ring, means for rotating the same, a bridge pivotally mounted on said ring and provided with a ratchet, and means carried by said body for engagement with said rotation of the former.

6. In a device of the character described, the combination of a gyroscopic body; and a transmission vgear for rotating said body ratchet, to, effect the comprising a pivotally mounted ring, means for rotating the same, a bridge pivotally mounted on said ring, the bridge pivots bein relation to the ring pivots, and a driving clutch interposed between said bridge and said body.

7. In a device of the character described, the combination of a vertical spindle provided with a cup at its upper end; a gyroscopic body provided With a depe needle bearing engaging said cup, a u iversally-mounted member having its center of oscillation located close .to the center of oscillation of said body, means' for rotating said member, and a driving clutch interposed between said member and said body to rotate the latter from the former.

ding y versally-mounted member having its center of oscillation located close to the center of oscillation of said body, said member being provided with a ratchet; means for rotating said member, and means carried by said vbody for engagement with said ratchet, to transmit the lrotation of said member to said body.

9. In a device of the character described, the combination of a vertical spindle provided with a cup at its upper end, a gyroscopic body provided with a depending needle bearing engaging said cup, .'a driving wheel freely rotatable on said spindle, driving means therefor, a pair of upstanding lugsv vcarried by said wheel, a ring pivotally connected at diametricallyfopposite points to said lugs, a bridge pivotally mountedon said ring, the bridge pivots being disposed at 900 in relation to the ring pivots, and a driving clutch interposed between' said bridge and said body.

10. In a device of the character described, the combination of a vertical spindle provided with a cup `at its upper end, a gyroscopic. body provided with .a depending needle bearing engaging said cup, a driving wheel freely rotatable on said spindle, driving means therefor, a pair of upstanding lugs carried by said wheel, a ring pivotally connected at dian'ietrically-opposite points to said lugs, a bridge pivotally mounted on said ring and having its upper surface ratcheted,

the bridge pivots being'disposed at 90 in relation to the ringpivots, and means ca rried by said body for engagement with said ratchet surface, thereby to effect the rotation of said body.

. In testimony whereof I have signed this. 

